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Inventor

Tohoru Tamagawa

Inventor
Chigasaki, JP

Overview

7→
Patents
1978–1995
Patent span
Electricity
Primary field (CPC H)

Patents· 7 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H01Hprimary
H01HElectric switches67%
H01FMagnets11%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light11%
H05HPlasma technique11%
PatentTitleYear
5,454,003'Gas laser oscillator'19954,698,467'Electrodes of vacuum switch'19874,458,121'DC Circuit breaker'19844,442,469'DC Circuit breaker apparatus'19844,434,332'Hybrid-type interrupting apparatus'19844,246,458'Vacuum interrupter'19814,110,806'Circuit interrupting apparatus for use in direct current circuits'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1984Patents assigned to TOKYO SHIBAURA ELECTRIC CO (5)· patent assignee history
1978Based in Yokohama, JP· patent location history
1981–1987Based in Chigasaki, JP· patent location history
1987–1995Patents assigned to TOSHIBA KK (2)· patent assignee history
1995Based in Machida, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TOKYO SHIBAURA ELECTRIC CO51978–1984
TOSHIBA KK21987–1995
Locations
LocationPatentsSpan
Chigasaki, JP51981–1987
Machida, JP11995
Yokohama, JP11978